[chore](trx-rs): run CI on self-hosted runner

Switch every CI job from ubuntu-latest to the self-hosted runner.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UiK871ht2uPFBHtMbxy3wD
Signed-off-by: Stan Grams <sjg@haxx.space>

.gitea/workflows/ci.yml

@@ -27,7 +27,7 @@ env:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: git.haxx.space/sjg/trx-rs/sdk:latest
     steps:
       - uses: actions/checkout@v4
@@ -40,7 +40,7 @@ jobs:
         run: sccache --show-stats
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: git.haxx.space/sjg/trx-rs/sdk:latest
     steps:
       - uses: actions/checkout@v4
@@ -53,7 +53,7 @@ jobs:
         run: sccache --show-stats
 
   frontend:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: git.haxx.space/sjg/trx-rs/sdk:latest
     defaults:
       run:
@@ -83,7 +83,7 @@ jobs:
         run: npm run verify-generated
 
   reuse:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     steps:
       - uses: actions/checkout@v4
       - uses: fsfe/reuse-action@v5